Source : WordNet®

Chief Executive
     n 1: the person who holds the office of head of state of the
          United States government; "the President likes to jog
          every morning" [syn: {President of the United States}, {United
          States President}, {President}]
     2: the office of the United States head of state; "a President
        is elected every four years" [syn: {President of the
        United States}, {President}]